package com.yilijk.base.crash;

import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Environment;
import android.util.Log;

import com.yilijk.base.utils.DevicesUtils;

import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.reflect.Field;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

public class CrashHandlerUtils implements Thread.UncaughtExceptionHandler  {

    private String app_local = "";
    public static final String TAG = "CrashHandler";
    //系统默认的UncaughtException处理类
    private Thread.UncaughtExceptionHandler mDefaultHandler;
    //程序的Context对象
    private Context mContext;
    //用来存储设备信息和异常信息
    private Map<String, String> infos = new HashMap<String, String>();

    //用于格式化日期,作为日志文件名的一部分
    private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");


    private static CrashHandlerUtils crashHandler;

    /**
     * 获取CrashHandler实例 ,单例模式
     */
    public static CrashHandlerUtils getInstance() {
        if (crashHandler == null) {
            synchronized (CrashHandlerUtils.class) {
                if (crashHandler == null) {
                    crashHandler = new CrashHandlerUtils();
                }
            }
        }
        return crashHandler;
    }

    private boolean isEnable = false;

    public void isEnable(boolean b) {
        this.isEnable = b;
    }

    /**
     * 初始化
     *
     * @param context
     * @param localPath 崩溃日志存放路径
     */
    public void init(Context context, String localPath) {
        this.app_local = localPath;
        mContext = context;
        //获取系统默认的UncaughtException处理器
        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
        //设置该CrashHandler为程序的默认处理器
        Thread.setDefaultUncaughtExceptionHandler(this);
    }

    /**
     * 当UncaughtException发生时会转入该函数来处理
     */
    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        if (isEnable) {//测试环境
            CrashModelBean model = parseCrash(ex);
            handleException(model);
            android.os.Process.killProcess(android.os.Process.myPid());
            System.exit(0);
        } else {
            if (!handleException(ex) && mDefaultHandler != null) {
                //如果用户没有处理则让系统默认的异常处理器来处理
                mDefaultHandler.uncaughtException(thread, ex);
            } else {
//            //退出程序
                android.os.Process.killProcess(android.os.Process.myPid());
                System.exit(0);
            }
        }
    }

    /**
     * 自定义错误处理,收集错误信息 发送错误报告等操作均在此完成.
     *
     * @param ex
     * @return true:如果处理了该异常信息;否则返回false.
     */
    private boolean handleException(Throwable ex) {
        if (ex == null) {
            return false;
        }
        //收集设备参数信息
        collectDeviceInfo(mContext);
        //保存日志文件
        saveCrashInfo2File(ex);
        return true;
    }

    /**
     * 收集设备参数信息
     *
     * @param ctx
     */
    public void collectDeviceInfo(Context ctx) {
        try {
            PackageManager pm = ctx.getPackageManager();
            PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(), PackageManager.GET_ACTIVITIES);
            if (pi != null) {
                String versionName = pi.versionName == null ? "null" : pi.versionName;
                String versionCode = pi.versionCode + "";
                infos.put("versionName", versionName);
                infos.put("versionCode", versionCode);
            }
        } catch (PackageManager.NameNotFoundException e) {
            Log.e(TAG, "an error occured when collect package info", e);
        }
        Field[] fields = Build.class.getDeclaredFields();
        for (Field field : fields) {
            try {
                field.setAccessible(true);
                infos.put(field.getName(), field.get(null).toString());
                Log.d(TAG, field.getName() + " : " + field.get(null));
            } catch (Exception e) {
                Log.e(TAG, "an error occured when collect crash info", e);
            }
        }
    }

    /**
     * 保存错误信息到文件中
     *
     * @param ex
     * @return 返回文件名称, 便于将文件传送到服务器
     */
    private String saveCrashInfo2File(Throwable ex) {

        StringBuffer sb = new StringBuffer();
        for (Map.Entry<String, String> entry : infos.entrySet()) {
            String key = entry.getKey();
            String value = entry.getValue();
            sb.append(key + "=" + value + "\n");
        }

        Writer writer = new StringWriter();
        PrintWriter printWriter = new PrintWriter(writer);
        ex.printStackTrace(printWriter);
        Throwable cause = ex.getCause();
        while (cause != null) {
            cause.printStackTrace(printWriter);
            cause = cause.getCause();
        }
        printWriter.close();
        String result = writer.toString();
        sb.append(result);
        Log.e("zyt", result);
        try {
            long timestamp = System.currentTimeMillis();
            String time = formatter.format(new Date());
            String fileName = "crash-" + time + "-" + timestamp + ".log";
            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                String path = app_local + "crash/";
                File dir = new File(path);
                if (!dir.exists()) {
                    Log.e("zyt", "exists-----" + dir.mkdirs());
                }
                FileOutputStream fos = new FileOutputStream(path + fileName);
                fos.write(sb.toString().getBytes());
                fos.close();
            }
            return fileName;
        } catch (Exception e) {
            Log.e(TAG, "an error occured while writing file...", e);
        }
        return null;
    }

    private void handleException(CrashModelBean model) {
        Intent intent = new Intent(mContext, CrashActivity.class);
        intent.putExtra(CrashActivity.CRASH_MODEL, model);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        mContext.startActivity(intent);
    }

    private CrashModelBean parseCrash(Throwable ex) {
        CrashModelBean model = new CrashModelBean();
        try {
            model.setEx(ex);
            model.setTime(new Date().getTime());
            if (ex.getCause() != null) {
                ex = ex.getCause();
            }
            model.setExceptionMsg(ex.getMessage());
            StringWriter sw = new StringWriter();
            PrintWriter pw = new PrintWriter(sw);
            ex.printStackTrace(pw);
            pw.flush();
            String exceptionType = ex.getClass().getName();

            if (ex.getStackTrace() != null && ex.getStackTrace().length > 0) {
                StackTraceElement element = ex.getStackTrace()[0];

                model.setLineNumber(element.getLineNumber());
                model.setClassName(element.getClassName());
                model.setFileName(element.getFileName());
                model.setMethodName(element.getMethodName());
                model.setExceptionType(exceptionType);
            }

            model.setFullException(sw.toString());
        } catch (Exception e) {
            return model;
        }
        return model;
    }

}
